And that's when I believe people do have a somewhat best effort to maximize profits. There are plenty of people that only care about career progression and think they can get away with lying and cheating their way to the top. They wouldn't believe that if it didn't work sometimes.
These medical studies are also run mainly to maximize profits, also by some career climbers. They are not run virtuously for the betterment of society.
So I would be astounded if they are as reliable as people might like to believe.
Maybe I'm just being grossly skeptical. Actually, I'd feel better if someone could convince me I'm completely unfounded here.